Synthesis of activated carbon-surfactant modified montmorillonite clay-alginate composite membrane for methylene blue adsorption

Ullah, Nasim; Ali, Zarshad; Ullah, Saadat; Khan, Amir Sada; Adalat, Bushra; Nasrullah, Asma; Alsaadi, Mustafa; Ahmad, Zubair

doi:10.1016/j.chemosphere.2022.136623

Cited by 47 publications

(17 citation statements)

References 41 publications

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“…Obviously, as a macromolecular surfactant, CbimPP exhibits excellent dispersion performance for MMT. To achieve an optimal exfoliation of MMT, the usage of CbimPP is only about 10 wt% of MMT, which is much less than the conventional surfactant dosage used in the previous works (Figure f). − Such an excellent dispersion performance of CbimPP originates from its special structural characteristic, including numerous hydroxyl groups, cationic groups, and polymer chain structure. Different from the edge-to-face intercalation mode of common micromolecular surfactants. , CbimPP polymer chains are adsorbed onto the MMT surface to exhibit a face-to-face intercalation mode (Figure g), based on multiple interactions such as an electrostatic attractive interaction and hydrogen bonding interaction.…”

Section: Results and Discussionmentioning

confidence: 97%

Seashell-Inspired Switchable Waterborne Coatings with Complete Biodegradability, Intrinsic Flame-Retardance, and High Transparency

et al. 2023

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Inspired by the "brick-and-mortar" structure and the whole lifecycle eco-friendliness of seashells, we have constructed a proof-of-concept and environmentally friendly coating with switchable aqueous processability, complete biodegradability, intrinsic flame retardance, and high transparency, via using natural biomass and montmorillonite (MMT). We first designed and synthesized cationic cellulose derivatives (CCD) as the macromolecular surfactants, which effectively exfoliated MMT to obtain nano-MMT/CCD aqueous dispersions. Subsequently, via a simple spray-coating process and a post-treatment process with a salt aqueous solution, the transparent, hydrophobic, and flame-retardant coating was fabricated with a "brick-and-mortar" structure. The resultant coating exhibited an extremely low peak heat release rate (PHRR) of only 17.3 W/g, which is 6.3% of cellulose PHRR. Moreover, it formed a lamellar and porous structure once ignited. Thus, this coating could effectively protect combustible materials from fire. In addition, the coating had a high transparency (>90%) in the range of 400−800 nm. After use, the waterresistant coating was converted into a water-soluble material by using a hydrophilic salt aqueous solution, which then could be easily removed by water. Furthermore, the CCD/nano-MMT coating was completely degradable and nontoxic. Such a switchable and multifunctional coating with whole lifecycle environmental-friendliness exhibits huge application potential.

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Section: Results and Discussionmentioning

confidence: 97%

Seashell-Inspired Switchable Waterborne Coatings with Complete Biodegradability, Intrinsic Flame-Retardance, and High Transparency

et al. 2023

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“…This was attributed to the fact that the PVB dose relative to the SDS concentration was low, so SDS could fully occupy the adsorption sites on the PVB surface. When the PVB dose exceeded 25 g/L, the decrease in q e may be due to the fact that there were not enough SDS molecules between the PVB particles and thus an excess of adsorption sites for PVB . Therefore, in subsequent experiments, 25 g/L was fixed as the dose of PVB particles.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…When the PVB dose exceeded 25 g/L, the decrease in q e may be due to the fact that there were not enough SDS molecules between the PVB particles and thus an excess of adsorption sites for PVB. 24 Therefore, in subsequent experiments, 25 g/L was fixed as the dose of PVB particles.…”

Section: Effect Of Particle Sizementioning

confidence: 99%

Adsorption of Sodium Dodecyl Sulfonate from Aqueous Solution by Polyvinyl Butyral: Kinetics and Thermodynamics

Sun

Zeng

2023

Ind. Eng. Chem. Res.

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During the synthesis of polyvinyl butyral (PVB), sodium dodecyl sulfonate (SDS) is generally added in appropriate amounts, which prevents PVB from agglomeration but also causes PVB to turn yellow. The removal of SDS and its final residue in PVB are closely related to the adsorption performance of SDS on PVB. In this study, PVB with a high acetal degree (81.96 mol %) was synthesized by polyvinyl alcohol and butyraldehyde and was characterized by 1H NMR, Fourier transform infrared spectroscopy, scanning electron microscopyenergy-dispersive X-ray spectroscopy, and other methods. The adsorption properties of SDS on PVB were investigated under different initial pHs, PVB doses, PVB particle sizes, contact times, initial SDS concentrations, and temperatures. The adsorption kinetic data were analyzed using pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The results showed that the pseudo-second-order model fitted the adsorption data well, and the intraparticle diffusion was not the only control mechanism for PVB adsorption. The equilibrium data were analyzed with Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich models. The results showed that the adsorption data conformed to the Langmuir model, and the maximum adsorption capacity of PVB for SDS was 40.5168 mg/g at 290.15 K. Moreover, the Dubinin–Radushkevich model illustrated that the adsorption process was chemisorption at low SDS concentrations and physical adsorption otherwise. The thermodynamic parameters showed that the adsorption of SDS on PVB was spontaneous and exothermic. In conclusion, the research results provide some basis for the PVB purification plant equipment.

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“…Among various treatment technologies, the adsorption method is considered as the most promising method because of its good stability and efficiency [ 12 ]. Numerous adsorbents, such as graphene oxide, chitosan, activated carbon and bentonite, have been used to remove MB from aqueous solution [ 13 , 14 , 15 , 16 ]. However, the application of these adsorbents is limited by a high cost and restricted regeneration performance.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste

Liu

Zhu

et al. 2023

Molecules

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In this study, high-performance modified biochar/alginate composite bead (MCB/ALG) adsorbents were prepared from recycled agricultural waste corncobs by a high-temperature pyrolysis and KOH/FeCl3 activation process. The prepared MCB/ALG beads were tested for the adsorption of methylene blue (MB) dye from wastewater. A variety of analytical methods, such as SEM, BET, FTIR and XRD, were used to investigate the structure and properties of the as-prepared adsorbents. The effects of solution pH, time, initial MB concentration and adsorption temperature on the adsorption performance of MCB/ALG beads were discussed in detail. The results showed that the adsorption equilibrium of MB dye was consistent with the Langmuir isothermal model and the pseudo-second-order kinetic model. The maximum adsorption capacity of MCB/ALG−1 could reach 1373.49 mg/g at 303 K. The thermodynamic studies implied endothermic and spontaneous properties of the adsorption system. This high adsorption performance of MCB/ALG was mainly attributed to pore filling, hydrogen bonding and electrostatic interactions. The regeneration experiments showed that the removal rate of MB could still reach 85% even after five cycles of experiments, indicating that MCB/ALG had good reusability and stability. These results suggested that a win-win strategy of applying agricultural waste to water remediation was feasible.

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Synthesis of activated carbon-surfactant modified montmorillonite clay-alginate composite membrane for methylene blue adsorption

Cited by 47 publications

References 41 publications

Seashell-Inspired Switchable Waterborne Coatings with Complete Biodegradability, Intrinsic Flame-Retardance, and High Transparency

Seashell-Inspired Switchable Waterborne Coatings with Complete Biodegradability, Intrinsic Flame-Retardance, and High Transparency

Adsorption of Sodium Dodecyl Sulfonate from Aqueous Solution by Polyvinyl Butyral: Kinetics and Thermodynamics

Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste

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